On Tue, 9 Mar 2021, Huang Pei wrote: > [PATCH 1/2] V4 vs V3: It will help if you don't change the subject proper of the cover letter with every iteration of a patch series, as in that case mail user agents (at least the sane ones) will group all iterations together in the thread sorting mode. With the subject changed every time the link is lost and submissions are scattered all over the mail folder. Maciej